NGC188 Polarissima Cluster (John R Carter, Sr.)

Celestial hemisphere: Northern · Constellation: Cepheus (Cep) · Contains: NGC 188

NGC188 Polarissima Cluster

I checked the weather by going outside. Clear skies. Even the weather forecast showed clear skies.

There was one thing I wanted to do and that was to check the quality of the images by defocussing the camera and looking at the “donuts” all around the field of view.

The “donuts” looked good all over..

I was checking this out by pointing at a large, open star cluster, NGC188, near the North Pole. It was looking so good that I thought I would go ahead and take a set of images. I checked the camera temperature and to my surprise it was at -15C. Perfect! So I set up for a run of 50 images at 60 seconds each. At the end, I went out to close up, and that’s when I found dew all over everything, including the lens of the telescope! (At least the computer was covered with a plastic sheet.) I should have known. There is always a heavy amount of moisture in the air for up to two nights after a rain. Dew on the telescope lens is like putting a cloud between the telescope and the stars.

Out of 50 images, the first 9 are acceptable. This is one of them.

The only processing done was to stretch and debayer with ASTAP.

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Distribution of astrophotographers

This table shows the number of distinct astrophotographers who have been assigned and IOTD/TP award compared to the total number of images awarded.
	Distinct awarded users	Total awarded images
Image of the day
Top picks
Top pick nominations

Distribution of subject types

This table shows the distribution of awards per subject type, compared to the popularity of images of that subject type.
	Image of the day	Top pick	Top pick nominations	Total submitted
Deep sky
Solar system
Extremely wide field
Star trails
Northern lights
Noctilucent clouds
Landscape

Distribution of data sources

This table shows the distribution of awards per data source, compared to the popularity of images acquired from that data source.
	Image of the day	Top pick	Top pick nominations	Total submitted
Backyard
Traveller
Own remote observatory
Amateur hosting facility
Public amaeteur data
Professional, scientific grade data
Mix of multiple sources
Other
Unknown

The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

Submitted The date and time when you submitted this image for IOTD/TP consideration.	...
Views by Submitters (available since September 19th, 2023) Every image is assigned to 50% of available Submitters. In the event that at least 80% of them don't view the image before its time in the IOTD/TP process expires, it's assigned to the other 50% of Submitters and the process begins anew.
Promotions by Submitters When 3 distinct Submitters promote the image, it moves on to the next stage of the process: evaluation for Top Pick status. This requirement, in addition to anonymization of images and distribution to only a subset of them, prevents biases and ensures that the best images are selected.
Promotions by Reviewers When 3 distinct Reviewers promote the image, it moves on to the next stage of the process: evaluation for IOTD status.
Early dismissal Staff members have a lot of images to inspect on a daily basis, and they can dismiss images if they believe they don't meet the requirements for IOTD/TP selection. If an image is dismissed 5 times, it's removed from the process. This streamlines the process and ensures that any bias present in promotions could be overruled by other staff members.

Status	Advanced success
Started	...
Astrometry.net job	4691497
PixInsight job	TIM8EH6FHFU9T00B43ET51XAEBWR05VN
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h50m01s.17
RA (top/left)	00h26m29s.72
RA (top/right)	01h12m35s.12
RA (bottom/right)	01h17m51s.83
RA (bottom/left)	00h23m05s.19

Dec (center)	+85°15′26″.5
Dec (top/left)	+84°49′38″.8
Dec (top/right)	+84°48′14″.6
Dec (bottom/right)	+85°37′40″.0
Dec (bottom/left)	+85°39′19″.3

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NGC188 Polarissima Cluster

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NGC188 Polarissima Cluster

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